<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			var i=100;
			var width=2090;
			var k=null;
			alert(k+":"+typeof(k));
			k=200;
			alert(k+":"+typeof(k));
			k="nihao";
			alert(k+":"+typeof(k));
			k=2>1;
			alert(k+":"+typeof(k));
			k=new Object();
			alert(k+":"+typeof(k));
			
			alert(typeof(f));
			
		</script>
	</head>
	<body>
	</body>
</html>
